describe('things behave correctly with negative minZoom', function () {
    /////////////////////////////
    // SETUP FOR EACH TEST
    /////////////////////////////
    var div, map, group;

    beforeEach(function () {
        div = document.createElement('div');
        div.style.width = '200px';
        div.style.height = '200px';
        document.body.appendChild(div);

        map = L.map(div, {minZoom: -3, maxZoom: 18, trackResize: false});

        map.setView(L.latLng(0, 0), -3);
    });

    afterEach(function () {
        if (group instanceof L.MarkerClusterGroup) {
            group.clearLayers();
            map.removeLayer(group);
        }

        map.remove();
        div.remove();

        div = map = group = null;
    });

    /////////////////////////////
    // TESTS
    /////////////////////////////
    it('shows a single marker added to the group before the group is added to the map', function () {

        group = new L.MarkerClusterGroup();

        var marker = new L.Marker([1.5, 1.5]);

        group.addLayer(marker);
        map.addLayer(group);

        expect(marker._icon).to.not.be(undefined);
        expect(marker._icon.parentNode).to.be(map._panes.markerPane);
    });

    it('shows a single marker added to the group after the group is added to the map', function () {

        group = new L.MarkerClusterGroup();

        var marker = new L.Marker([1.5, 1.5]);

        map.addLayer(group);
        group.addLayer(marker);

        expect(marker._icon).to.not.be(undefined);
        expect(marker._icon.parentNode).to.be(map._panes.markerPane);
    });

    it('creates a cluster when 2 overlapping markers are added before the group is added to the map', function () {

        group = new L.MarkerClusterGroup();
        var marker = new L.Marker([1.5, 1.5]);
        var marker2 = new L.Marker([1.5, 1.5]);

        group.addLayer(marker);
        group.addLayer(marker2);
        map.addLayer(group);

        expect(marker._icon).to.be(undefined);
        expect(marker2._icon).to.be(undefined);

        expect(map._panes.markerPane.childNodes.length).to.be(1);
    });
    it('creates a cluster when 2 overlapping markers are added after the group is added to the map', function () {

        group = new L.MarkerClusterGroup();
        var marker = new L.Marker([1.5, 1.5]);
        var marker2 = new L.Marker([1.5, 1.5]);

        map.addLayer(group);
        group.addLayer(marker);
        group.addLayer(marker2);

        expect(marker._icon).to.be(null); //Null as was added and then removed
        expect(marker2._icon).to.be(undefined);

        expect(map._panes.markerPane.childNodes.length).to.be(1);
    });
});
